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Slide Scanner Repair Manual Functional Description

Scanner Process Overview

Upon command from the host computer, a scan operation is initiated. When this scan operation

is initiated, the microcontroller on the main controller PC board coordinates all the slide scanner's

electronic systems in digitizing, color-correcting and sharpening the image, then transmitting it to

the host's memory (Figure 2-1). The microcontroller sets scanning mode and area of interest

according to commands received from the host computer before the scan starts.

The transporter system carries the image through the scanning area (slot) while the lamp

illumination and optics projects and focuses the image line-by-line onto the CCD array on the

image sensor PC board. The image sensor circuits generate analog electrical signals

proportional to the intensity of the light. The output of the CCD array is then buffered and

multiplexed into the video signal processor (VSP) where it is processed and then fed into the

analog-to-digital (A/D) converter. The analog-to-digital (A/D) converter (10-bit A/D converter

for SS35/SS35 ES, 12-bit A/D converter for SS35 PLUS) converts the analog signal into a

digital image. Next, the primary correction ASIC applies correction parameters for uniformity to

the digital image. The primary correction ASIC then sends uniformity corrected image data to

the preview image buffer. When the host computer requests the image data, the preview image

buffer applies it through the secondary color correction ASIC pipeline where the user/film file

color correction, tone scale correction and sharpness parameters are applied. The corrected

image data is then sent to the host computer via the SCSI interface.

Figure 2-1. Scanning process

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35 mm

Transparency

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Transporter

Video Signal

Processor

(VSP)

A/D

Converter

SCSI

Interface

Color

Correction

ASIC

(ESCAPADE)

Main Controller

PC Board

Image Sensor

PC Board

Microcontroller

Lamp

Host Computer

Scanning

Area

8-Bit

Bus

Primary Correction

ASIC for SS35/SS35 ES

DSP for SS35 PLUS

Preview

Image

Buffer

Filter Wheel

CCD

Lens

ND/IR/AR

Filter

Opaque/ ND

Filter

Tunnel

- Filter Set Assembly w/Stepper Motor used on original SprintScan 35. Also used on

SprintScan 35 ES up to serial no. B6xxxxxxD.

123456

2345

123456

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23456789012345678

1234567890123456789

Lens

AR/IR Filter

SS35

SS35 ES

SS35 PLUS

Notes: • Input

• Output

Brand	Polaroid
Model	SprintScan SS35
Category	Scanner
Language	English

Polaroid SprintScan SS35 User Manual

Table of Contents

Questions and Answers:

Polaroid SprintScan SS35 Specifications

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